After reading the reviews for this recipe I decided to try it anyway. I think those who didn't have success are inexperienced cooks who don't understand cornstarch. Anyway, I used 2-3 Tablespoons of cornstarch, not teaspoons. 1/4 c. sugar, because the choc. chips are so sweet. I added 3 heaping tablespoons of Hershey's Special Dark Cocoa, Dutch process. Oh, my, what a great ingredient! You have to cook the milk concoction til it boils, which means you have to use some heat to get it to thicken, which it does no problem if you use enough cornstarch and enough heat. My family loves this recipe and I think next time I'll try adding 1/4 peanut butter or a few peppermint sticks for a change. Excellent ice cream.